URIteacherknowledge - Reflection, Refraction, Diffraction, Absorption of Sound

Rhode Island Department of Education
Lesson Plan

Lesson Title: Reflection, Refraction, Diffraction and Absorption of Sound

State Standards: GLEs/GSEs

see unit

National Standards:

see unit

Context of Lesson:

Overview of lesson, including: where it fits in unit, what are key ideas and what will students be doing.

Opportunities to Learn:

Depth of Knowledge

Prerequisite Knowledge

Plans for Differentiating Instruction

Accommodations and modifications

Environmental factors

Materials

Objectives:

Instruction:

Opening:

Engagement:

note

The speed of sound for various gases at 0oC:
||~ Gas ||~ Speed (meters/second) ||

Air	331
Carbon Dioxide	259
Oxygen	316
Helium	965
Hydrogen	1290

filling a balloon with Carbon Dioxide should form an acoustic lens, suggest a balloon about a foot across and half as thick like a mylar Happy Birthday balloon. They hold the gas longer too. credit this idea to C L Strong, Amateur Scientist column of Scientific American, 1956.

try Helium for a diverging lens too

Closure:

Assessment:

Reflections

(only done after lesson is enacted)

Reflection, Refraction, Diffraction, Absorption of Sound